Fix for keystroke panning
Fix for keystroke panning

- fixed problem with left & down pans

pllim/ginga,ejeschke/ginga,stscieisenhamer/ginga,naojsoft/ginga,ejeschke/ginga,pllim/ginga,ejeschke/ginga,stscieisenhamer/ginga,naojsoft/ginga,pllim/ginga,naojsoft/ginga,stscieisenhamer/ginga